Does Car Insurance Cover Modifications? Rules for Indian Car Owners

At a glance

Why standard policies stop at factory spec

Your car insurance Insured Declared Value (IDV) is calculated from the manufacturer's listed selling price of your exact variant, depreciated for age. Anything bolted on afterwards simply isn't in that number, so insurers treat it as a separate risk that has to be declared and priced on its own. This applies to both third-party and comprehensive policies — third-party covers liability to others, not your car's parts at all, while comprehensive covers your own vehicle only up to what's declared.

What actually happens if you don't declare a mod

Two outcomes are common. First, a partial rejection: if a fire or accident damages your aftermarket sound system or alloy wheels, the surveyor pays out only for standard-spec parts, not the upgrade. Second, a full claim rejection: if the modification is illegal under the Motor Vehicles Act (an unauthorised silencer, altered chassis, or a colour change not updated on the RC), insurers can argue the vehicle wasn't being used in a condition matching its registration, and refuse the entire claim, not just the part.

The CNG/LPG kit trap

This is the most common real-world dispute. Retrofitting a CNG or LPG kit changes the fuel system and must be (a) fitted by an RTO-approved installer, (b) endorsed on the RC book, and (c) insured with a specific CNG/LPG kit add-on, typically ₹500–₹1,500/year depending on kit value. Without this, damage to the kit itself, or a fire traced to it, is very unlikely to be paid.

How to insure modifications properly

1. List every non-factory addition and get invoices for each — insurers need proof of value.
2. Call your insurer (or check IRDAI-regulated insurer websites) and ask for the specific add-on: 'electrical accessories cover' for audio/lighting, 'CNG/LPG kit cover' for retrofit fuel systems, or a request to increase IDV to include cosmetic mods.
3. Get the mod endorsed on the RC at the RTO if it's a fuel-system, colour, or engine-related change — this is a legal requirement, not just an insurance one.
4. Renew the add-on every year alongside your main policy; add-ons usually don't auto-carry the same way NCB (No Claim Bonus) does.
5. Avoid RTO-illegal mods altogether (see our legal modifications guide) since no add-on can insure something that isn't road-legal in the first place.

Cost of declaring mods vs staying silent

Declaring aftermarket parts raises your premium modestly — typically 5–15% more on the comprehensive premium depending on the value added — but it means a genuine claim actually gets paid. Staying silent saves that small amount every year but risks the full repair or replacement cost of the modification, and in the worst case, the insurer voiding the entire claim over an undeclared illegal change. For a kit or upgrade worth more than about ₹15,000–₹20,000, declaring it almost always works out cheaper over a policy's lifetime.